The SoundsChecker extension does not collect, transmit, or sell personal data. It has no account, no analytics, and no advertising. It does not read browsing history, page contents, or microphone input, and it does not contact any server; the only network requests are those your browser makes when you choose to open a soundschecker.com link. Tones are generated locally with the Web Audio API; audio is not recorded or uploaded. The storage permission is used only to remember preferences (volume, last frequency, stereo balance) in local extension storage on your device. Full site: https://soundschecker.com/